2026-04319: New Mexico and Oklahoma Statewide Tribal Municipal Separate Storm Sewer System (MS4) General Permit Proposal
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The Environmental Protection Agency (EPA) Region 6 is providing notice of a proposed National Pollutant Discharge Elimination System (NPDES) statewide general permit for storm water discharges from Tribal municipal separate storm sewer systems (MS4s) located in urbanized areas in the states of New Mexico and Oklahoma. This permit offers discharge authorization to regulated MS4s within the boundaries of the Bureau of the Census-designated 2000, 2010, and 2020 urbanized area and any other MS4s designated by the Director as needing a MS4 permit.
The agency’s own summary, as published.
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